<template>
  <header class="header">
    <h1>todos</h1>
    <input id="toggle-all" class="toggle-all" type="checkbox" v-model="isAll" />
    <label for="toggle-all"></label>
    <input
      v-model.trim="content"
      @keyup.enter="addFn"
      class="new-todo"
      placeholder="输入任务名称-回车确认"
      autofocus
    />
  </header>
</template>

<script>
import { mapMutations, mapState } from "vuex";

export default {
  data() {
    return {
      content: "",
    };
  },

  methods: {
    ...mapMutations("todos", ["add", "changeIsAll"]),

    addFn() {
      // 判断是否为空
      if (this.content === "") {
        return alert("请输入内容");
      }

      this.add(this.content);

      //清空添加内容
      this.content = "";
    },
  },

  computed: {
    ...mapState("todos", ["list"]),

    isAll: {
      get() {
        return this.list.every((item) => item.isDone);
      },
      set(val) {
        // console.log(val);
        this.changeIsAll(val);
      },
    },
  },
};
</script>
